The Keeley Hydra combines high-fidelity reverb and tremolo to add space and dimension to your guitar, bass, or keyboard signal. Bathe your sound in Spring, Plate or Room Reverb, then add tap-tempo enabled Harmonic, Vibrato, or Sine Wave Tremolo with the press of a button. You can easily change the order of effects or the character of the Tremolo or Reverb with the Hydra's smart Alt Controls. You can even create an Infinite Hold Reverb Trail! Save up to three presets with ease. The Hydra can be used with pro remote switching systems and offers both TRS Expression Pedal and External Tap Tempo inputs. Experience next-level processing power in this pedalboard-friendly enclosure.

• metal housing
• 2 x 6.3 mm mono in / output jacks (true stereo)
• 6.3 mm expression pedal input
• 6.3 mm input for external footswitch
• power supply via optional 9V DC adapter, 2.1 x 5.5 mm barrel plug, polarity (-) center
• battery operation: not supported
• current draw: 115 mA
• dimensions (L x W x H): 120 x 68 x 58 mm
• weight: ca. 350 g